x-lite is giving me a "408 - Request Timeout".
I've set it up according to what voipo support said.
Please see image.



Here's a trace to sip.:
Tracing route to sip.voipwelcome.com [74.52.58.50]
over a maximum of 30 hops:

1 2 ms 1 ms 1 ms zeus.voipwelcome.com [74.52.58.50]
2 10 ms 10 ms 14 ms 73.209.216.1
3 362 ms 10 ms 10 ms ge-3-25-ur02.bearcreek.tx.houston.comcast.net [6
8.85.249.241]
4 13 ms 12 ms 12 ms po-12-ur01.royalton.tx.houston.comcast.net [68.8
5.244.85]
5 11 ms 13 ms 12 ms po-11-ur02.royalton.tx.houston.comcast.net [68.8
5.244.90]
6 12 ms 12 ms 13 ms po-14-ar02.royalton.tx.houston.comcast.net [68.8
5.244.93]
7 13 ms 16 ms 12 ms po-17-ar02.greenspoint.tx.houston.comcast.net [6
8.85.244.130]
8 20 ms 18 ms 16 ms te-0-1-0-4-cr01.dallas.tx.ibone.comcast.net [68.
86.91.57]
9 18 ms 18 ms 18 ms theplanet-cr01.dallas.tx.ibone.comcast.net [68.8
6.88.50]
10 17 ms 18 ms 16 ms te7-1.dsr02.dllstx3.theplanet.com [70.87.253.18]

11 17 ms 18 ms 18 ms te3-3.dsr02.dllstx2.theplanet.com [70.87.253.126
]
12 21 ms 33 ms 18 ms 96.fe.5746.static.theplanet.com [70.87.254.150]

13 19 ms 18 ms 16 ms zeus.voipwelcome.com [74.52.58.50]

This system is in the DMZ, I've turned off firewall, anti-v protectors, ad-aware, etc... there's nothing that should be blocking it.
Any ideas, folks? I'm at my wits end, here.